The problem is in a lot of cases I’ll see stuff that’s slightly cheaper on their site but then shipping is ridiculous.
I ordered a mono price stand up desk recently. The price on Amazon was $10 more, but Monoprice wanted $45 for domestic shipping! So I waited three extra days and saved $35.
It’s kind of a toss up now between speed and price depending on the item. I mean, it always was, but when prime is functioning normally, the speed is almost always worth the price (to me).